Awater molecule has a permanent dipole moment of magnitude 6.2 x 10–30 c. m. what is the electric field strength 1.0 nm from a water molecule at a point on the dipole's axis? (b) without deriving, draw a well-labelled diagram representing a solid sphere of charge with radius r and provide: 1. the equation that gives the magnitude of the electric field outside the sphere, 2. and the equation that gives the magnitude of the electric field inside the sphere, (c) a proton is fired from far away at a 1.0 mm diameter glass sphere that has been charged to +100 nc. what initial speed must the proton have to just reach the surface of the glass? (d) a proton with a speed of 2.0 x 105 m/s enters a region of space in which source charges have created an electric potential. what is the proton's speed after it moves through a potential difference of 100 v?